Fabrication of oriented tungsten nano-tips by field-assisted water etching

Fabrication of oriented tungsten nano-tips by field-assisted water etching

We report the field-assisted H2O etching that enabled us to fabricate nano-tips from polycrystalline oriented tungsten wires at room temperature. We optimized the sharpening procedure in order to obtain field emissions (FEs) with high collimation. The typical tip apex was composed of a large base an...

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Veröffentlicht in:Applied surface science 2011-08, Vol.257 (20), p.8427-8432
Hauptverfasser: Onoda, Jo, Mizuno, Seigi
Format: Artikel
Sprache:eng
Schlagworte:
Electric potential
Etching
Finite element method
Nanocomposites
Nanomaterials
Nanostructure
Tungsten
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Zusammenfassung:We report the field-assisted H2O etching that enabled us to fabricate nano-tips from polycrystalline oriented tungsten wires at room temperature. We optimized the sharpening procedure in order to obtain field emissions (FEs) with high collimation. The typical tip apex was composed of a large base and a nano-protrusion with a radius of curvature less than 3.5a"
ISSN:0169-4332
DOI:10.1016/j.apsusc.2011.04.124